Merge pull request #294 from gmlewis/i2194-add-url-prefix-to-pprof

Update docs to add URL prefix to pprof middleware

api/middleware/pprof.md

@@ -29,6 +29,16 @@ After you initiate your Fiber app, you can use the following possibilities:
 app.Use(pprof.New())
 ```
 
+In systems where you have multiple ingress endpoints, it is common to add a URL prefix, like so:
+
+```go
+// Default middleware
+app.Use(pprof.New(pprof.Config{Prefix: "/endpoint-prefix"}))
+```
+
+This prefix will be added to the default path of "/debug/pprof/", for a resulting URL of:
+"/endpoint-prefix/debug/pprof/".
+
 ## Config
 
 ```go
@@ -38,6 +48,13 @@ type Config struct {
     //
     // Optional. Default: nil
     Next func(c *fiber.Ctx) bool
+
+    // Prefix defines a URL prefix added before "/debug/pprof".
+    // Note that it should start with (but not end with) a slash.
+    // Example: "/federated-fiber"
+    //
+    // Optional. Default: ""
+    Prefix string
 }
 ```
 
@@ -47,4 +64,4 @@ type Config struct {
 var ConfigDefault = Config{
     Next: nil,
 }
-```
+```